A 26-year-old woman is in custody on suspicion of contributing to her 4-year-old son's death, police said.

About 4:57 p.m. Tuesday, Gregory police officers were called to Northshore Emergency Center in Portland about a child who was admitted, according to a news release from the department.

CPR was performed on the child.

Tawana Roberson(Photo: Contributed photo/San Patricio County Jail)

Hospital personnel told police a woman took her son to the medical center because he was "sick." The child was later taken to Driscoll Children's Hospital in Corpus Christi. He was pronounced dead at the hospital, the release states.

Roberson says she is "going through the worst nightmare a mother could ever go through."

She identifies her son as Kane Tamarr McCraney, and includes several photos of seven children.

" ... I received the worst news of my life and it's still unreal to me and I keep beating myself up saying (what) if I would of took him earlier then maybe he will still be here (with) us," the post reads. " ... Kane baby mommy love (you) and I wish (you) could of told me (what) was wrong (with) u please watch over me and your siblings and guide us down the right path I wish I could of had more time with you Kane ..."

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Lynda Walker with the Texas Municipal Police Association teaches a Child Occupant Restraint Enforcement class to Corpus Christi Police officers, Corpus Christi Independent School District Police officers and caregivers of young children at the Corpus Christi Police Department on February 7, 2019. The goal of the class is to create awareness of the importance of child passenger safety eduction and enforcement in preventing child deaths and injuries. Rachel Denny Clow/Caller-Times

Lynda Walker with the Texas Municipal Police Association teaches a Child Occupant Restraint Enforcement class to Corpus Christi Police officers, Corpus Christi Independent School District Police officers and caregivers of young children at the Corpus Christi Police Department on February 7, 2019. The goal of the class is to create awareness of the importance of child passenger safety eduction and enforcement in preventing child deaths and injuries. Rachel Denny Clow/Caller-Times

Lynda Walker with the Texas Municipal Police Association teaches a Child Occupant Restraint Enforcement class to Corpus Christi Police officers, Corpus Christi Independent School District Police officers and caregivers of young children at the Corpus Christi Police Department on February 7, 2019. The goal of the class is to create awareness of the importance of child passenger safety eduction and enforcement in preventing child deaths and injuries. Rachel Denny Clow/Caller-Times

Lynda Walker with the Texas Municipal Police Association teaches a Child Occupant Restraint Enforcement class to Corpus Christi Police officers, Corpus Christi Independent School District Police officers and caregivers of young children at the Corpus Christi Police Department on February 7, 2019. The goal of the class is to create awareness of the importance of child passenger safety eduction and enforcement in preventing child deaths and injuries. Rachel Denny Clow/Caller-Times

A Child Occupant Restraint Enforcement class was held at the Corpus Christi Police Department with the goal of creating awareness of the importance of child passenger safety eduction and enforcement in preventing child deaths and injuries. The class also aimed to teach law enforcement making traffic stops how to identify common misuse of safety seats. Rachel Denny Clow/Caller-Times